VULNERABILITY INTELLIGENCE

CVE-2026-58090

CVSS score7.8 HIGH
EPSS probability0.15%
CISA KEVNot currently listed
Published2026-08-26
Last modified2026-09-24
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

The SOCK_STREAM receive path in the unix socket implementation failed to fully detach control messages from the socket buffer before processing them. Some error paths would free those messages, leaving freed data mbufs in the receive socket buffer. An unprivileged local user can exploit this use-after-free to escalate privileges.

Weakness classification

  • secteam@freebsd.org: CWE-416

Primary references